Articles | Volume 21, issue 11
https://doi.org/10.5194/bg-21-2655-2024
https://doi.org/10.5194/bg-21-2655-2024
Research article
 | 
04 Jun 2024
Research article |  | 04 Jun 2024

Long-term fertilization increases soil but not plant or microbial N in a Chihuahuan Desert grassland

Violeta Mendoza-Martinez, Scott L. Collins, and Jennie R. McLaren

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Cited articles

Adeel, Z. and Safriel, U.: Ecosystems and human well-being: Desertification Synthesis., 36 pp., ISBN 1-56973-590-5, 2005. 
Allison, S. D., LeBauer, D. S., Ofrecio, M. R., Reyes, R., Ta, A. M., and Tran, T. M.: Low levels of nitrogen addition stimulate decomposition by boreal forest fungi, Soil Biol. Biochem., 41, 293–302, https://doi.org/10.1016/j.soilbio.2008.10.032, 2009. 
Báez, S., Fargione, J., Moore, D. I., Collins, S. L., and Gosz, J. R.: Atmospheric nitrogen deposition in the northern Chihuahuan desert: Temporal trends and potential consequences, J. Arid Environ., 68, 640–651, https://doi.org/10.1016/j.jaridenv.2006.06.011, 2007. 
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We examine the impacts of multi-decadal nitrogen additions on a dryland ecosystem N budget, including the soil, microbial, and plant N pools. After 26 years, there appears to be little impact on the soil microbial or plant community and only minimal increases in N pools within the soil. While perhaps encouraging from a conservation standpoint, we calculate that greater than 95 % of the nitrogen added to the system is not retained and is instead either lost deeper in the soil or emitted as gas.
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